VOLUME
2 3 , N O . 2, F E B R U A R Y
ψ
49 A
1951
PRECISION POLARIMETER Qu&n&ttieed ta n&oâ directly ta 0.01 ana!
H
ere is an excellent instrument to use for macro, or macro and micro work in research and general polarimetry. A unique "micro-device" allows image-field diaphrams of 1, 2, 3 and 6 mm. aperture to be introduced by a simple lever action, thereby eliminating light reflections from sample tube walls.
Two novel features are: 1) Simplified zero adjustment with instructions engraved on scale cover. 2) New type friction drive. These allow quicker, more convenient readings than ever before. Additional features consist of an adjustable Lippich half-shade polarizer . . . heavy one-piece stand with covered trough for tubes up to 400 m m . length . . . detachable lamp arm interchangeable with spectroscope-monochromator for all wave lengths of the visible range.
M o d e l N o . 70
Write for complete details on this No. 70 Polarimeter—as well as other models ranging from utility (0.1° accuracy) to high precision (0.002° accuracy)!
SCIENTIFIC GLASS APPARATUS CO..INC. BLOOMFIELO - NEW JERSEY LABORATORY APPARATUS - IHSTRUMEHTS - CHEMICALS · GLASSWARE
REPRINTS of these symposia and feature articles from ACS journals may be obtained promptly. All are timely — each contains up-to-date information covering an important field of chemistry or chemical engineering: Name
R e p r i n t e d from
"Fluorine Chemistry"
l&EC, March ' 4 7 and Analytical Ed., March ' 4 7 J A C S , November ' 4 6 J A C S , November ' 4 7 Analytical Ed., O c t . '47
" N u c l e i Formed in Fission" (page size 7V4" x 1 0 " ) "Ion-Exchange Resins" "Raman Spectra" "Vapor Pressure" "Unit Processes 1st Annual Review" "Unit Processes 2nd Annual Review" "Materials of Construction 2nd Annual Review" "Materials of Construction 3rd Annual Review" "Unit Operation 3rd Annual Review" "Unit Operations 4th Annual Review" "Analytical Chemistry 1st Annual Review" "Azeotropic Data" Part II "Azeotropic Data" Parts I & I I , Combination only "Atmospheric Contamination & Purification" "Corrosion Testing in Pilot Plants" "Titanium Symposium" "Chemical Facts & Figures—1950" "Absorption & Extraction" "Adsorption Symposium"
Page
Prie
214 32 114 70 l&EC, April '47 32 144 l&EC, September '48 l&EC, September ' 4 9 114 164 l&EC, October '48 64 l&EC, October ' 4 9 l&EC, January '48 56 56 l&EC, January ' 4 9 283 Analytical Chemistry, Jan. & Feb. '49 42 Analytical Chemistry, July '49 Analytical Chemistry, A u g . ' 4 7 & July ' 4 9) 144 109 l&EC, November ' 4 9 l&EC, March, April & M a y '49 l&EC, February ' 5 0 l&EC, June ' 5 0 l&EC, June ' 5 0 l&EC, July ' 5 0
56 71 232 80
Send orders to S p e c i a l P u b l i c a t i o n s D e p a r t m e n t , AMERICAN CHEMICAL SOCIETY 1155 Sixteenth St., IV.W. Washington 6 , » . C.
.75 .35 .35 .35 .35 .50 .50 .75 .50 .50 .50 1.50 .35 .85 .75 .25 .50 .75 .75 .50
